RT Journal Article SR Electronic T1 Sport-Related Concussions JF North Carolina Medical Journal JO N C Med J FD North Carolina Institute of Medicine SP 93 OP 94 DO 10.18043/ncm.76.2.93 VO 76 IS 2 A1 Guskiewicz, Kevin YR 2015 UL http://www.ncmedicaljournal.com/content/76/2/93.abstract